NEW DEVELOPMENTS FOR TILTING TRAINS Alessandro ELIA Tilting - - PowerPoint PPT Presentation

▶

Apr 09, 2024 334 likes •493 views

November 2001 November 2001 NEW DEVELOPMENTS FOR TILTING TRAINS Alessandro ELIA Tilting Systems Director New Developments for tilting trains A view of the prototype 3 kV EMU train ETR401 VT610 DMU for DB Railways Goal of Pendolino project:

SLIDE 1

November 2001 November 2001

NEW DEVELOPMENTS FOR TILTING TRAINS Alessandro ELIA Tilting Systems Director

SLIDE 2

New Developments for tilting trains

A view of the prototype 3 kV EMU train ETR401 VT610 DMU for DB Railways

Goal of Pendolino project:

to improve service speed on regional lines, with quite poor track quality,
mantaining full safety and
a comfort level compatible with then-offered one

Activity started in Italy around 1966, up to mid '70, The first tilting unit (Y0160) was build and tested in early '70, The first EMU in service, the ETR401 was delivered in 1975. The series production of ETR450, entered in service in 1988. The VT610 was delivered on early '90s

SLIDE 1 - The approach, the prototype, first application in Italy and Germany

SLIDE 3

Electro-Hydraulic Pendolino Tilting mechanism Pendulum mechanism Pneumatic Active tilting bogie and bogie frame and hydraulic actuator Lateral Suspension The new bogie has been developed starting by 1991 and the ETR460 train is in service from 1994. Bogie architecture basically unchanged in respect of Etr450/VT610: New features: :

tilting system totally underfloor
body bolster simplified connection
redesigned axlebox guide
simplified bogie frame concept

Improved Traction concept and car body design:

DC/AC traction power systems, designed for bi-current and three-current solutions.
wider modular carbody, in large extrusions profiles
pressure tightness, in two different options (pressure-sealed, pressurised)

SLIDE 2 - The Electro-Hydraulic Pendolino

Hydraulic tilting actuators Tilting rods Bogie bolster Body bolster Active Lateral Suspension

New Developments for tilting trains

SLIDE 4

. Tilt command scheme The reference signal is measured through the acceleration of a non-tilting part of the vehicle (bogie frame). The gyroscope measures the roll angular velocity of the bogie frame. System starts to tilt following through the gyroscope the transition's geometry. After a short time, the accelerometer signal is added. On the cars following, the reference signal is basically the acceleration

SLIDE 3 - The Tilting command concept.

ELECTROMECHANICAL SYSTEM - BLOCK SCHEME α measured angle α angular rate I current motor ÿ lateral acceleration ω

vertical axle gyro

α α SENSOR BOX SE ZNR ÿ ω

WNR DRU DRU

α SA SA I I θ

1, θ 2, θ i,

α α Z Y X

CARBODY

α α θ

I DRU α θ

New Developments for tilting trains

SLIDE 5

Tilting mechanism Pendulum mechanism Tilting mechanism and Pneumatic Active and bogie frame and hydraulic actuator hydraulic actuation system Lateral Suspension The new bogie has been developed starting by 1991 and the ETR460 train is in service from 1994. Bogie architecture basically unchanged in respect of Etr450/VT610: New features: :

tilting system totally underfloor
body bolster simplified connection
redesigned axlebox guide
simplified bogie frame concept

Improved Traction concept and car body design:

DC/AC traction power systems, designed for bi-current and three-current solutions.
wider modular carbody, in large extrusions profiles
pressure tightness, in two different options (pressure-sealed, pressurised)

SLIDE 4 - The Electro-Hydraulic Tilting Bogie

Bogie bolster Pantograph frame Bodyshell cublicles Pantograph Articulated joint Support levers and equalizer

Hydraulic tilting actuators Tilting rods Bogie bolster Body bolster Active Lateral Suspension

New Developments for tilting trains

SLIDE 6

New developments for tilting trains

. Roller mechanism and Electro-mechanical Electro-mechanical Active Lateral Suspension electro-mechanic actuator bogie assembly tilting actuator in electro-mechanical tilting bogie Tilting mechanism: Roller link between the tilting bolster and the bogie frame. Electromechanical Tilting Actuator: planetary roller spindle + brushless motor driven by Electric Power Unit.. Secondary suspension = single air-spring + two roll-bars. Longitudinal traction link drives anti-yaw dampers. No Active Lateral Suspension is required by swept envelope. Active Lateral Suspension where very high levels of comfort are required Pantograph is controlled vs. catenary by an active electromechanical servo-system ( brushless motor + sliding frame)

SLIDE 5 - The Electro-Mechanic Tilting Bogie

SLIDE 7

New developments for tilting trains

Centre of gravity Tilting centre

8 °

w w'

TAct

Kinematics of tilting and self-centring effect Tilting systems is intrinsically self-centring in case of fault. During the tilting phase, centre of gravity is kept approximately at the same position. During the tilt rotation the reaction centre position guarantees the stability No reaction is transmitted to bogie; therefore, effects to wheel/rail are negligible.

SLIDE 6- Self-centring effect.

SLIDE 8

New developments for tilting trains

Train control system Hydraulic tilting Electro-mechanical tilting functional scheme functional scheme

SLIDE 7 - Tilting control system

Serial line 2 Serial line 1 Serial line 2 Serial line 1

MASTER UNIT MASTER UNIT SLAVE UNIT SLAVE UNIT

I N P U T O U T P U T I N P U T O U T P U T I N P U T O U T P U T I N P U T O U T P U T

HEAD VEHICLE HEAD VEHICLE INTERMEDIATE VEHICLE INTERMEDIATE VEHICLE

HYDRAULIC EQUIPMENT

ELECTRICAL SUPPLY SWITCH ON/OFF SIGNAL HYDRAULIC POWER REFERENCE SIGNAL ERROR SIGNAL FEEDBACK SIGNAL ELECTRONIC CONTROL UNIT HYDRAULIC JACKS CARBODY TILTING HYDRAULIC JACK POSITIONING DELIVERY

Oil level Temperature Oil pressure

ANGLE TRANSDUCER SERVOVALVE HYDRAULIC POWER GENERATION CONTROL SIGNAL KINEMATIC MOTION

ELECTROMECHANICAL SYSTEM - BLOCK SCHEME α measured angle α angular rate I current motor ÿ lateral acceleration ωz vertical axle gyro α α SENSOR BOX SE ZNR ÿ ω

WNR DRU DRU

α SA SA I I θ

1, θ 2, θ i,

α α Z Y X CARBODY ω

α α θ

I DRU α θ

SLIDE 9

New developments for tilting trains

SLIDE 8 - Pendolino in the world

SLIDE 10

New developments for tilting trains

SLIDE 9 - Developments - High Cant deficiency bogies, with EM actuators and tilting rods

SLIDE 11

New developments for tilting trains

SLIDE 10 - Developments - TILTRONIX concept

SLIDE 12

New developments for tilting trains

SLIDE 11 - Developments – Semi active lateral Suspension

SLIDE 13

New developments for tilting trains

SLIDE 12 - Developments – Active Dampers

DAMPING COEFFICIENT [ Ns / m ]

ACTIVE ACTIVE Hydraulic Hydraulic

FREQUENCY [ Hz ] 5 10 15 20 1 2 3 4 5

SLIDE 14